Found a solution by myself (thanks to NextScripts for their quick answer…), writing it down if people have similar problems.

In the file inc/nxs_ntlist_class.php, at lines 282 and 283, change ‘0’ with ‘2’

exactly :
if (isset($pMeta[‘timeToRun’])) $optMt[‘timeToRun’] = $pMeta[‘timeToRun’]; $optMt[‘do’] = 0;
if (isset($pMeta[‘do’])) $optMt[‘do’] = $pMeta[‘do’]; else { if (isset($pMeta[‘msgFormat’])) $optMt[‘do’] = 0; }

to

if (isset($pMeta[‘timeToRun’])) $optMt[‘timeToRun’] = $pMeta[‘timeToRun’]; $optMt[‘do’] = 2;
if (isset($pMeta[‘do’])) $optMt[‘do’] = $pMeta[‘do’]; else { if (isset($pMeta[‘msgFormat’])) $optMt[‘do’] = 2; }

But be very careful with this change, you’ll need to do it at every update and every post will go through filters !!